Let's say that I go the page: "http://example.com/page1.php"
At page1.php an (asynchronous) AJAX call is made to "http://example.com/page1.php?action=getSomethingBig" which takes a long time (60 seconds maybe) to load.
Before the AJAX call is done (maybe I'm tired of waiting), I click a link to go to: "http://example.com/page2.php".
How do I avoid that the browser has to wait for the AJAX call to complete before going to "page2.php"?